Marine Weather and Tides
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
|Sunrise 6:18AM||Sunset 7:55PM||Sunday August 25, 2019 6:07 PM CDT (23:07 UTC)||Moonrise 12:00AM||Moonset 3:19PM||Illumination 21%|
7 Day Forecast for Marine Location Near Sparta, WIHourly EDIT Help
Area Discussion for - La Crosse, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 karx 251958|
area forecast discussion
national weather service la crosse wi
258 pm cdt Sun aug 25 2019
Short term (this evening through Monday)
issued at 258 pm cdt Sun aug 25 2019
main focus is on shower storm chances Monday.
Water vapor imagery this afternoon showed several several shortwave
troughs across the central us with mid upper moisture streaming
across the region as the ridging of the past few days slides to the
A transient band of light showers sprinkles has been working east
and north across the area along the leading edge of the mid-level
moisture gradient this afternoon. Temperatures were in the mid-60s
Tonight, shortwave troughs across northern mo and central mn will
lift northeast ahead of the primary upper trough and cold front
across the northern plains. Large scale forcing for ascent will be
weak, but persistent modest warm advection isentropic ascent
could produce a few showers at times. Low temperatures will range
from the mid-50s to lower 60s.
The trend for Monday continues to be a bit slower with the upper
trough and cold front from the west. Scattered showers will remain
possible Monday morning in the broad warm advection regime with
increasing low stratus as moisture continues to advect northward.
With the arrival of the front and stronger forcing from the
shortwave trough in the afternoon, expect showers storms to increase
from the west. A noticeably more humid airmass will briefly occupy
the area with pwats climbing to 1.5 to 1.75 inches. With widespread
cloud cover likely across the area, destabilization will be muted,
with href mean mucapes up to around 1000 j kg in advance of the
front and 0-6 km bulk shear of 30 to 40 kts. Despite strong forcing,
expect the weak instability to limit our severe potential, but a few
storms may produce gusty winds hail. The system should be
progressive enough so flooding isn't much of a concern.
Long term (Monday night through Sunday)
issued at 258 pm cdt Sun aug 25 2019
on Monday night, the rain chances will gradually shift east as the
surface cold front and longwave trough moves east of the area.
Additional rainfall amounts will be up to three quarters of an
inch along and east of mississippi river. Low temperatures will
range from the mid-50s to lower 60s.
From Tuesday into Wednesday, an upper level low will drift|
northeast across western and northern ontario. With cold air
aloft, most unstable capes will climb up to 500 j kg on Tuesday
afternoon and up to 250 j kg on Wednesday morning. Due to this,
added a small chance of showers and thunderstorms for these time
periods in north-central wisconsin. With there being model
differences on the southern extent of this precipitation, these
precipitation chances may have to be shifted south and increased.
High temperatures will be mainly in the 70s on Tuesday and range
from the lower 60s to mid-70s on Wednesday. The low temperatures
on Wednesday morning will be mainly in the lower and mid-50s. May
have to lower them into the upper 40s in central wisconsin.
Things looking drier for Wednesday night into Thursday morning, as
brief surface ridging passes over our area. However, latest models
show a cold front mid level trough moving through the area by
late Thursday. There is some question of whether this will be
enough to produce precipitation, as the GFS and to some extent the
ecmwf show some precipitation Thursday evening, while the
canadian is dry. Current model blend does not give precipitation
and with lower confidence this many days out, will leave as is.
Thursday looks like the warmest day of the extended period, with
highs approaching 80 in spots as the area briefly warms up ahead
of the front.
High pressure and cooler weather then look to nudge into our area
for the weekend.
Aviation (for the 18z tafs through 18z Monday afternoon)
issued at 1214 pm cdt Sun aug 25 2019
mainlyVFR conditions expected into tonight with CU developing
along with mid-level ceilings working in from the south and west.
As low-level moisture increases late tonight into Monday morning
ahead of a cold front, potential exists for ifr MVFR stratus to
develop. Expect any showers to remain quite spotty through
tonight, with showers storms increasing on Monday, especially
around or beyond 18z. Winds will remain from the SE with some
gusts to around 20 kts possible this afternoon.
Arx watches warnings advisories
Short term... Jm
long term... Lee boyne
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Sparta, Sparta / Fort McCoy Airport, WI||4 mi||73 min||SE 6||10.00 mi||Partly Cloudy||69°F||58°F||71%||1016.6 hPa|
|Black River Falls Area Airport, WI||22 mi||73 min||SE 4||10.00 mi||Partly Cloudy||72°F||57°F||61%||1016.3 hPa|
|La Crosse - La Crosse Regional Airport, WI||24 mi||75 min||SE 6||10.00 mi||Fair||72°F||59°F||64%||1015.1 hPa|
Link to 5 minute data for KCMY
Wind History from CMY (wind in knots)
|1 day ago||E||E||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||E||E||SE||S||SE||SE||S||SE||SE|
|2 days ago||NE||Calm||SE||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||E||SE||E||E||E||Calm||SE||SE||Calm|
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for La Crosse, WI (19,4,5,8)(on/off)  Help
Ad by Google
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.